R&D of a new 1-dimensional /spl gamma/-ray position sensor using scintillators coupled to a Si strip detector

• Published in: IEEE Nuclear Science Symposium Conference Record, 2005 Vol. 1; pp. 186 - 190
• Main Authors: Itoh, T., Kokubun, M., Takashima, T., Yanagida, T., Hirakuri, S., Miyawaki, R., Takahashi, H., Makishima, K., Tanaka, T., Nakazawa, K., Takahashi, T., Honda, T.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 2005
• Subjects: Energy resolution; Gamma ray detection; Gamma ray detectors; Gas detectors; Image sensors; Optical imaging; Physics; Research and development; Solid scintillation detectors; Strips
• ISBN: 0780392213; 9780780392212
• ISSN: 1082-3654; 2577-0829
• DOI: 10.1109/NSSMIC.2005.1596233

As the detection part of an improved Fourier synthesis imager, we developed a new one-dimensional gamma-ray position sensor consisting of inorganic scintillators whose lights are read out by a silicon strip detector (SSD). The employed SSD has no metal anode, with its Al-cathode divided into 32 channels of 400 mum pitch. Electrodes of all channels are Al-bonded to a low noise analog ASIC, so that signals can be read out from all channels simultaneously. We fabricated a "stacked CsI scintillator", consisting of 20 CsI(Tl) scintillator plates each having a dimension of 10 mm times 10 mm times 0.3 mm, and 0.07 mm-thick light reflective sheets inserted between adjacent CsI plates. Coupling the scintillator and the SSD, gamma-ray with energies gsim 500 keV were successfully detected, with a position resolution of ~0.37 mm